Electric hammer.



H, F. WHALTON.

ELECTRIC HAMMER. APPLICATION FILED NOV. 22, 1910.

Patentefi June 2?, 1911.

HILARY F. "WHALTON. OF KEY WEST, FLQBIDA.

ELECTRIC HAMMER.

Specification of Letters Patent.

Patented June 27, 1911.

Application filed November 22, 1910. Serial No. 593,709,

the novel construction and combination of the parts hereinafter fullydescribed and claimed. I

In the drawings, Figure 1 is a front view of the electric hammer withthe front of the case removed. Fig. 2 is a side view of the operatingmechanism of-the hammer. Fig. 3 is a cr0ss-section taken on the line inFig. 2. Fig. 4 is a diagram of the electrical connections.

A. is the inclosingcase.

B and C are two stationary solenoids arranged one above the other in thecase A.

D is a core which is slidable in the two solenoids, and which has aframe E secured to its middle part. Buffers (Z are provided for theframe to strike againstto limit the movements of the core D. The frameis provided with V-shaped guides e which are slidable in guidebars e onthe case A. The frame E ext-ends around the lower solenoid C whichstrikes the blow, and which is larger and. more powerful than thesolenoid B which retracts the hammer head after the blow has beenstruck.

F is the hammer shaft which is secured to the frame E, and which slidesin a hole f in the bottom of the case; and f is the hammer head securedon the projecting end portion of the shaft F.

G is an adjustable resistance of any ap-' proved kind arranged incircuit with the solenoids and provided with a lever or linger-piece 9'.

H is a tappet secured to the slidable frame E, and h is a slidabletappet-bar provided with projections h at its ends for the tappet toengage with. The tappet-bar h is provided with guide-bars i which areslidable vertically in guides a" secured to the case A.

I and K are two insulated contact-pieces secured opposite to each otherin the case A; and J is an insulated contact-lever -pivoted' to the caseby a pin L and providedwith a contact-piece j. The contact-pieces areall preferably formed of carbon, and

M is a switch-lever pivoted to the case by a pin m. One end of thislever ,is pivotally connected by a pin m to an armn on the tappet-bar h,and the other end of the lever M is provided with a cylinder N.

P is an insulated piston slidablcin the cylinder N, and p is a wheeljournaled in the projecting end portion of the piston P and bearingagainst the contact-lever J, so as to rock the contact-lever on itspivot when theswitch-lever M is oscillated on its pivot by means ofthetappet mechanism.

It is a finger-piece connected to-the tappet-bar h and projecting fromthe case, so as to afford a means for starting the tappet mechanism. r

S is a switch for starting and stopping the hammer. I

The current passes from the line wire 2 through the switch to theresistance G, and thence by wire 3 to the contact-lever J. Thecontact-piece I is connected with the solenoid C by a wire 5; and thecontactpiece K is connected with the solenoid B by a wire 6, Bothsolenoids are connected with the other line wire 7 by wires 8 inparallel with each other.

The tappet H makes and breaks the circuit automatically as long ascurrent is supplied, and the hammer sha t is reciprocated by theslidable core of the solenoids. When the parts are in the positionsindicated in Fig. 4:, the contact-lever J is in connection with thecontact-piece I so that the solenoid C is energized and a blow isstruck. hen the hammer descends the tappet mechanism operates theswitch-lever M and places the contactdever in connection with thecontactpiece K so that the solenoid B is energized and the hammer shaftis retracted, and these operations are repeated as long as current issupplied.

What I claim is:

1. In an electric hammer, the combination, with a case provided withguide-bars,

and two solenoids secured in the case and arranged axially in line witheach other; of a slidable core common to both solenoids, a frame securedto the said core and slidable in the said guide-bars and inclosing oneof the solenoids, a hammer shaft secured to the said frame andprojecting from the said case, electric connections for energizing thesaid solenoids, switch mecha-- nism for switching the current betweenthe said solenoids, and tappet mechanism connected with the said coreand operating the switch mechanism automatically.

2. In an electric hammer, the combination, with a case provided withguide-bars, and two solenoids of unequal strength secured in the case;of a slidahle core common to both solenoids, a frame having one endportion secured to the said core between the solenoids and inclosing thestronger solenoid, a hammer shaft secured to the other end portion ofthe said frame and projecting from the case, electric connections forenergizing the said solenoids, switch mechanism for switching the ourrent from one solenoid to the other and tappet mechanism connected withthe said core and operating the switch mechanism automatically.

In testimony whereof I have ailiXed my signature in the presence of twowitnesses.

HILARY F. VVHALTON. Witnesses:

ED VAN DELDEN, S. M. LESTER.

